Improvement in carding-machine teeth



UNITED. STATES PATENT-OFFICE.

WILLIAM H. WHITING, OF WILLINGTON, CONNECTICUT, ASSIGNOR TO HIMSELF AND MARCUS M. JOHNSON.

IMPROVEMENT IN CARDlNG-MACHINE.' TEETH.

Specification forming part of Letters Patent No. 107,842, dated September 27, 1870.

I, WILLIAM H.WHir1Ne, of Willington, in the county of Tolland and the State of Connecticut, have invented an Improved Card- Tooth, of which the following is a specification:

N more and Object of the Intention.

My card-tooth is for use in machines for carding cotton, wool, and iiax; and the object of theimprovement is to so harden and shape that part of the tooth which is near the point that this part shall be more durable than the rest Vof the tooth, leaving the body or crown Y of the tooth unaltered, and of its original toughness and tenacity.

Description of thc Accompanying Drawing.

Generali Description.

Card-teeth are commonly of about the size shown in Fig. 1, and consist, generally, of apiece of wire-bent into the general shape indicated lin Figs. 1 and 3. They are made in a machine specially constructed for that purpose. A simple way of making my improved tooth would be to cut the wire into proper lengths, flatten the ends of these cut pieces sidewise, under a sudden blow or under rolls, till the ends are shaped as shown in Figs. 2 and 3, and then bend the piece into the required general shape. As a matter of fact, however, I make my card-teeth in the ordinary machine, after making some change inthe machine, which it is foreign to the purpose of this instrument to describe here.

I am well aware that John L. Tuttle, in his patent dated October'll, 1856, describes steel card-teeth iiattened throughout their whole length in a peculiar manner, and I am also jaware that R. Kitson, in his patent of November 11, 1851, shows substantially thevsame thing in iron; but to neither of these inventions do I make anyclaim.

I only iiatten my tooth from the point b to about the elbow a, and the advantages I gain are, first, I make the point of the tooth hard, and thus more durable; second, I make the point of the tooth long in the direction of its motion for labor, and thus increase its durability; third, I leave the body or crown of the tooth, from the elbow c to elbow a, unhardened and uniiattened, so that it can be freely bent into the general shape required without any danger of breaking from brittleness. N or will my tooth break from thisV cause v while at Work, for the body of the tooth is left unaltered, which is a great advantage over the teeth described in both the aforesaid patents.

Claim.

A carding-machine tooth having its points f WILLIAM H. WHITING.

Witnesses GEORGE E. RoBBINs, S. C. EATON. 

